1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de6a287be9ea6fa7289ad169a93cdad857b88745bc1666ac6d8e74265aa3e70. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/781ce075-f799-4873-acfe-be9aa51a713f.json and https://artists.proofprofile.net/proofs/artist/781ce075-f799-4873-acfe-be9aa51a713f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3147fbeed50d9cdbeb9c7c3f9ce8800f7bfab339c495a61d394e5dcf97228e9d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2584462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb17f780f3e07a82872ef26e58d21abf767fab0e2eba99b7d35c586eb6fbdfb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFR2538032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9665fd442c20811ffc3129ece1f08d782aebe48dfebc96daf11012a89cb047. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:46:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2556521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac77c7b224cb8ec11fb246400b71c1dece7981cd20d1f935e3541275fb333a5a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2505286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aedcf733f4a7a8e4d4b730ddcdc47dddba9440d60b6c63c09fc41e251d48a42. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:36:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7S2579500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8da022b554867e31b18121d3463fab3653a723c259726cc60a98532e6ed0ca. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7V2532714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fd221f9b2f254e94834aecb43bbf6c1dac9157b29e763a7a539f73705f1528. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3EY2582916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b1d1e8534cfdb3af67000e7dc8eeb5eb7839e2a5505885c8b7f50266119c61. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6E72553389.